# while
i = 1
while i <= 10:
    if i % 9 == 0:
        break
    if i % 3 == 0:
        i += 1
        continue
    print(i, end="\t")
    i += 1
print()

while i < 0:
    print(i, end="\t")
    i += 1
else:
    print("i >= 0")

# for
for i in range(10, -1, -2):
    print(i, end="\t")
print()

visited = set()
for c in "hello":
    if c in visited:
        break
    visited.add(c)
    print(c, end="\t")
print()

for n in [1, 2, 3, 4, 5, 6, 7, 8, 9]:
    if n % 2 == 0:
        continue
    print(n, end="\t")
print()
